MyTeslaMate
IDB family

IDB_a120_EPAS3Pinvalid

Not Available

What does the IDB_a120_EPAS3Pinvalid alert mean?

Invalid Electronic Power Assisted Steering Primary (EPAS3P) steering angle signal qualifier (QF) is received.

What you'll see in your Tesla

  • Not Available

What triggers it

The Integrated Dynamic Brake (IDB) receives the EPAS3P_internalSASQF CAN signal as UNDEFINABLE_ACCURACY for longer than 100 milliseconds, or the EPAS3P_sysStatus CAN message has a checksum, counter, or message length error.

When it clears

EPAS3P_internalSASQF Controller Area Network (CAN) signal is received as valid for 100 milliseconds.

Potential impact

There may be an issue with the transmitting Electronic Control Unit (ECU).

Affected models

Model Y 2025+

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Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.